Bird

I quite often blip a bird. This one has me foxed though; it was mixed in with a Roman cremation, and stained with copper at the other end, I know it's a tibiotarsus, but it's not from a chicken (which is the only bird I know the anatomy of, or, of which I know the anatomy, to be more grammatical).
I gave up, and sent in the report without IDing the exact species.

I feel so dirty.

Does anyone have Dale Serjeantson's Atlas of Bird Bones? I've looked at all the online stores and can't find it for sale anywhere...